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add SH-internal memory mapped register access method.

This commit is contained in:
uch 2002-02-08 06:11:16 +00:00
parent 70b2ffae62
commit 66510b76a9
1 changed files with 23 additions and 1 deletions
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24
sys/arch/sh3/include/cpufunc.h
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@ -1,4 +1,4 @@
/* $NetBSD: cpufunc.h,v 1.7 2001/06/24 05:32:55 msaitoh Exp $ */
/* $NetBSD: cpufunc.h,v 1.8 2002/02/08 06:11:16 uch Exp $ */
/*
* Copyright (c) 1993 Charles Hannum.
@ -48,6 +48,28 @@
#include <sh3/mmureg.h>
#ifdef _KERNEL
/*
* memory-mapped register access method.
*/
#define _wb_flush() /* not required */
#define _reg_read_1(a) (*(__volatile__ u_int8_t *)((vaddr_t)(a)))
#define _reg_read_2(a) (*(__volatile__ u_int16_t *)((vaddr_t)(a)))
#define _reg_read_4(a) (*(__volatile__ u_int32_t *)((vaddr_t)(a)))
#define _reg_write_1(a, v) \
{ \
*(__volatile__ u_int8_t *)(a) = (u_int8_t)(v); \
_wb_flush(); \
}
#define _reg_write_2(a, v) \
{ \
*(__volatile__ u_int16_t *)(a) = (u_int16_t)(v); \
_wb_flush(); \
}
#define _reg_write_4(a, v) \
{ \
*(__volatile__ u_int32_t *)(a) = (u_int32_t)(v); \
_wb_flush(); \
}
void enable_ext_intr __P((void));
void disable_ext_intr __P((void));